> The first user who starts an RC session can start an RC from another host,
> but no other user can start an RC until that person quits.
It's worse than that. Two different users can't use html5 audio/video with firefox (and presumably other mozilla products) consecutively, as well as concurrently, unless the temporary directory is cleaned out. This basically means that if you share your home computer with your spouse/partner, you are out of luck. (For distributions such as ubuntu which do clear out the /tmp directory on reboots, you can at least reboot if your significant other wants to use his/her user account, but that is hardly convenient.)